A design method for core lattice structure with adjustable deformation mode

Abstract

The invention discloses a method for designing a core lattice structure with adjustable deformation mode, comprising: constructing an orthogonal structural unit formed by orthogonal splicing of multiple lattice elements, the orthogonal structural unit is arrayed to form a representative structural unit, the representative structural unit is arrayed to form an array structure, taking the center of the array structure as a reference, removing the core part structure in the shape of a cube from the array structure to obtain a core-free array structure, wherein the lattice element is a basic three-dimensional structure with an upper bottom surface and a lower bottom surface; performing three-dimensional buckling modal deformation on the representative structural unit to obtain a core structure with a three-dimensional negative Poisson's ratio; taking the core structure as the core part of the core-free array structure, splicing it with the core-free array structure to form a core lattice structure; and realizing deformation mode adjustment of the core lattice structure by adjusting the volume ratio of the core structure to the core-free array structure, and the size ratio of the upper bottom surface and the lower bottom surface of the lattice element of the array structure.

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